If you're looking for something in the iterim, noclip produced a documentary on the making of Doom (2016) that's pretty engaging. It briefly discusses the Zenimax lawsuit but doesn't go deep into it.
DOOM Resurrected, Part 2 - Designing a First Impression (Doom Documentary) - https://www.youtube.com/watch?v=vsoVQWnSOfM
DOOM Resurrected, Part 3 - Guns, Guitars & Chess on Mars (Doom Documentary) - https://www.youtube.com/watch?v=r0nOsuaPDeg
I too recommend these.
Noclip also has a bunch of extended interviews that you can find on their channel or in related videos but I haven't seen those so can't comment on whether or not they are worth looking at.